I'm building a new PC and I was wondering whether it is really worth going for the 4th gen of intel processors. I already have a gigabyte B75-D3V motherboard which isn't too bad in my opinion, and I was wondering whether it's worth getting an i5 3570 or getting a new motherboard and an i5 4670. That would be a lot more expensive but is it really worth it if I want a fairly future proofed PC that will be good enough for the next couple of years.